1. Sal is moving overseas and brings in a professional auctioneer to sell a number of household items in a backyard auction. Among the goods Sal wants to sell is a digital keyboard she has owned for two years. When the keyboard comes up for auction, the auctioneer says, "The vendor has stated the keyboard is in good working order." Bob is the highest bidder. After he gets the keyboard home, he is annoyed to find two of the keys do not work. a) With reference to the principles of contract formation, in your own words explain fully the contractual relationships which typically arise between the vendor, auctioneer, and highest bidder respectively in at an auction